Stoker.



P. L. CROWE.

STOKER.

APPLICATION FILED 00T.1, 1907.

1,077,872, y Patented Nov. 4,1913.

2 SHEETS-SHEET 1.

IN-H7 cases:

' parts, as will be hereinafter fully described- UNITED STATES PATENT OFFICE."

PAUL L. CROWE, OF JERSEY CITY, NEW JERSEY.

STOKER.

Specification of Letters Patent. 1 Patented Nd 1913 Application filed October 1, 1907. Serial No. 305,466.

' To all 3127mm it may concern:

Be it known that I, PAULL. Crown, a:

citizen of the United States, residing at Jersey City, in the county of Hudson and State of New Jersey, have invented certain new and useful Improvements in Stokers;

and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use thesame. 3

This invention relates to stokers, and has for an object to providea stoker embodying new and improved features of underfeeding. 1

A further object of the invention is to provide in a Stoker improved means for forcing fuel. downwardly at an incline below the -i ition surface of the fuel contained in he combustionchamber. .A further object of theinvention is-to provide in a stoker improved means for.

conducting airfroin a conduit or air chainber nto-the burning mass.

' A further object of the nvention is toprovide in a stoker an inclined fuel supporting surface with an improved ash dumping grate orplate disposed at the lower end oftheincline. A further object of'thc invention is to provide in- .astok'er an inclined fuel sup- Sporting surface with improved means for agitating'the fuel 'mass and forcing freshfuel under the burningfmass- .A further object of the invention is to provide in a stoker an improved. twyer block adapted for association with the form of retort or fuel supporting trough disclosed herein; or. in association with other retorts. With these and other ob ects in View} the invention consists of'certain novel construc tions, combinations and arrangements of Fig. 1'. Fig. 5 is a longitudinalsectional.

view off-one of the fuel troughs as on line 5 5 of Fi (i. Fig; 6 is a perspective view of one of t e twyer blocks. Fig. 7 is a per: spective view of a plate adapted for use at -the :lower end of a fuel trough and-to 'support the extreme twyer'block. Fig. 8 is a view in end elevation of the lower' extremity ofthe fuel trough showing the means for maintaining the shafts in association therewith. Fig. 9 is a View in rear elevation of ameans for mounting the ash. plate or grate. Fig. 10 is a view of the ash plate or grate in end elevation. Fig. 11' is a diagrammatic view of the blower associatedwiththe stoker mechanism.

Like characters of reference designate corresponding parts throughout the several.

views. v

Thestoker forming the subject-matterof thisapplicationis adapted for association with a furnace for any a-p roved use'and' represented conventionally y a. rear wall .15 and a front'wall or 'arch.' 16', with-a conventional water tube boiler 17 mounted above the arch. It is also, of course,..to be understood that side walls 18 are provided,

thereby limiting and defining the size and position of the stoker.

The stoker comprises a plurality offuel troughs 19 cll'sposedat an inclination with the higher erids toward the outer end of the -furnace or combustion chamber and shown.

under 'the' conventional arch 16 The troughs'are supported in any approved manner, as by an angle iron 20 secured to the.

.under side of the front arch and any approved number of fuel troughs may be em ployed 'by' providing the said troughs with flanges 21, along,their lower or under sides and bolting the several sections'together by means of bolts, as 22, through the flanges.

The fuel troughs 19 are located as shown with reference to flanged under plates 23.

defining between the said under plate 23 and the bottom of the fuel'trough 19 a space, as

24, through which air is supplied to the Stoker in any approved manner, as through the opening 25, but the invention isnot liniited'to theintegrality' above referred to.

Along the greater portion of theirlengths the fuel troughs 19 are spaced apart at their upper longitudinal edges as shown particu larly at 26 in Figs. 3 and 4, and a plurality of twyer blocks 27'are disposed between the. said spaced longitudinal edges. The twyer blcck's,-as shown particularly in Fig. 6, comprise a central or body portion having flanges Qs forined. at their upper edg s. ore terably disposed 'at an angle to each other to arm with the base of the twyer blockapp oximately a triangle. The base of the twy block is provided with notches form- 'ing '{shoulders 29 spaced at a little distance below the lower extremities of the flanges 28 st that when thetwyer blocks bear upon indicated at above the edge of the trough. 7

the #gngitudinal edges of the fuel troughs rality of openings are provided, as

andbeneath the extremities of the flanges 28 .It will thus be seen that when air is forced intq the chamber 24, it isallowed to pass outwardly in a large number. of jets through the openings formed as above described and into'the fuel masswhich is disposed upon.

the inclined supporting surface. To further assist in properly spacing the twyerblocks,

a rib-31 may be employed disposed to'en-, gage a similar rib carried uponthe adjacent block to space the blocks apart centrally, the

said twyer blocks being maintained in opern ative positions by the edges of the fuel troughs engaging the dove-tailed lower portions. Within the fuel troughs 19a pusher 32 is mounted to slide longitudinally-and'with the trough formed conca'e, as shown -partieularly in cross-section in Fig. 4. the pusher 32 is formed with a convex lower side, .the complement of the concavity of the fuel trough. To move the pusher 32 longitudinally of. the trough a chain 33 or other flexible means is employed extending longitudinally of the said trough and pass-- ing at the lower end over a roller 34 and'at the upper end over a sprocket 35 mounted upona shaft 36 whichpreferably extends laterally through the side of the stoker and is provided with any approved means for imparting rotary motion thereto, here shown as the crank arm 37'. --The. chain 33 may v form an endless conveyer extending entirely sideof the stoker with theturn buckle 38 around the roller and spro cket, but preferably a. rod 37 mounted upon the under interposed in the lengthof said "rod and adapted to exert varying degrees of tension 11 on'the rod and chain. To permit the c ain 33 to enter and le'ave'the trough 19,

' passages 39and 40 are provided, the former in the lower end and the latter in -the upper end, and blocks 41 and 42'are carried rigidly upon the'chain 33 positioned to close the' said openings39 and 40 when the pusher 32 is in normal position adjacent the top of the, fuel trough and .to prevent the passage of fuel and air through the said-passages 39 and 40. Tofproperly journal the shaft car-;

rying the rollers 34, a-recess 43 is formedin the lower flanges of the trough and air casings, andeach of-the flanges is-provided.

with a half hole as shown at'44 F ig, 8 and in dotted lines irrF 51o ermit'the insertion ofgai'bolt thez'et {to prevent "36 carrying the sprockets, but

usually found necessary means for maintaining th' ima es displacement of the shaft journaledtin said I recess; A like recess 45 is provided in the 1 flanges at the-upper end oftliememb'ers to j permitthe journaling therein 0f upon such shaft'is downwa loy any sha t. within such recess.

4 Adjacent the lower end ofthe fuel trough. a plate-like portion 46 is provided and an auxiliary, plate 47 is positioned tos'pan-the concavity of thetrough and provided with upstanding cars '48 positioned to 5 engagethe lower one of the series of twyer blocks and prevent" displacement thereof. The lower flanges of the sections are also provided with recesses 49 within which is mounted a-shaft 50 carrying the ashor dumping grate and preferably extending outwardly through the side of the stoker and provided with means for rotating, as the crank arm 51. 'On the shaft 50 are mounted a number of grate frames 52 car: *rying' grate sections 52", the frames being operated by shaft-50. The operating means grate frames 52 curved at 53 to embrace the shaft, and a lever 54 secured to the curved portion by pivot; 55. The grate frames shown at 50,- The; lever 54. is provided witha detent 56having a notch,proportione'dto fit and engage the squared'shaft 50 and with a spring 57 adapted to hold the said lever in engagement with the shaft. A hook or ring 58 is also provided at the lower end of the lever to permit a "shown in 9.and 10 include shaft 50,]

may be amounteddirectly on shaft 50 as Y boiler or furnace, it is preferable to connect the air blast directly to the stoker and preferably in the manner shown in.Figs. 2, 3,

number of sections and the casing 62 is constructed separate from the stoker sections and applied to a cut out portion 63 of theflange 21.

. 5 and 11., The fan can beattached to any That shaft 64 is-continuous carrying any number of fans desired. The fan casing 62 being open at or a'djacent the center permits air. to pass freely into the stoker twyer when the blast is-not being operated .per-' mitting the stoker to be used under natural chimney draft at any time. desired. Within the casing. 62 any' approv'ed form of rotary fan is employed shown conventionally at 65 which said-fan is mounted upon'the' shaft 64 and rotated therewith any-f approved ma ner;

Above the sicker a "fuel hopper 61 is mounted withan opening in the lower side thereof adapted ,to be substantially closed by the pusher 32 when at the extreme upper limitof its movement. When the pusher 32 is moved .downwardly the fuel hopper being open \Ylll. permit the fuel to pass from the hopper through the opening and follow the pusher downwardly within the trough but the weight-ofs uch fuel will-prevent the fuel returning with the pusher and owing to its angular or inclined structure the fuel.

is pushed. outwardlyitoward and into the burning fuel inas's'. 1

-In operation, the troughs are filled with fuel in substantially the usual and ordinary, manner; and when the fuel bedis thoroughly.

' ignited more fuel is'supplied thereto until a proper combustion bed has been secured. Fuel is supplied to the hopper-G1 and by a movement of the shaft 36 the pusher is [moved downwardly, as indicated by the arrow in Fig. l, permitting fuel to fall from' 'stirred'so-tha-t undueeoking is prevented and when returned to normal position thepusher eausesthe fuel to move toward the upper 'end," of the combustion chamber. \Vhen suflicient aslrhas accumulated upon the-dump grates they are dumped by rotating the shaft by means of the crank arm 51. If for any reason it is desirable to dumpa single section of the dump grates or plate independently the fire hook is inserted in the hook58 of the lever 5i and the lever drawn as indicated by the arrow, which releases the detent 56 from engagement with-the shaft 50 and also moves the grate 52 angularly relative thereto. The return movement of the fire hook and'lever 5-l returns the grate section to position until the detent 56 again engages the. squared shaft 50 to hold it'in norm'alposition. Any approved construction of ash hopper or chute may be disposed beneath and to receive material from the ash grate 5:2, as shown in Fig. 1.

' I claim: V

I. In a stokeig-a' fuel trough disposed atan inclination and having openings formed through the opposite ends thereof,- a pusher movable longitudinally within the trough,

means to niovethe pusher, and stops carried by the moving means and arranged to close the o eni-r-gs.

2. In a s'oker, a plurality of fuel trou hs provided with upwardly extending si es,

plates provided w'ii' downwardly extending flanges forming with the-troughs an an casing, 'means for connecting the flanges of ad acent plates, and means connectingthe sides to providea fuel surface above a plurality .of such casing divisions.

movable longitudinally withinthe trough, a

flexible fcable adaptedto movethe pusher and extending without the trough and.

through the said openings, and stoppers carried by the cable adapted to close the openings.

shaft and movabletherewith upon rotation thereof and arranged to receive fuel from the said inclined fuel support, and means to .permit anynumber of fumes to 'remain stationary while the rema ning frames are actuated. i

5. In a stoker, a fuel support, squared shaft journaled adjacent the support, a plurality of grate frames mounted upon the shaft. and arranged to receive fuel fromtlie fuel supp'ort,.-an operating lever mounted 4. In a Stoker, an inclined fuel support, shaft journaled adjacent the lower edge of the fuel support. grate frames carried by the upon each of the frames and arranged to en-.

gage the shaft, and means to facilitate the disengagement of the lever from the shaft.-

(3. In a stoker, fuel troughs provided with an air troughs and in communication with the air casing. means within the fuel troughs adapts 'casing, -twyers mounted on the ed to distribute fuel therein, a flexible deviceconnected with said fuel moving means,

means to operate the flexible device, inde;

pendent dumping grate frames located at the lower end of the troughs, a shaft carry- 4 ing and adapted tooperate the frames simultaneously, and means to move the "grate frames independently of each other.

7. In a stoker, a plurality of fuel troughs having upwardly extending sides, plates provided with 'downwar 1y forming an air casing beneaththe troughs,- means jforclosing the ends of'the-troiighs, a

fuel moving deviceuwithin each trough, and

a cable connecting the fuel moving devicev with the means last mentioned.

ioo

extending flanges forining'with the troughs an air cas- In testimony whereof I afiix my signature in'presence o'f tivo Witnesses.

v-PAUL L. CROWE. \Vitnesses;

MQFQQARROLL. 

